Chemistry, 19.03.2021 21:00 jojojolie6505
When a piece of copper metal at 100ºC was placed into a cup of water at 25ºC, the final temperature of both substances reached 30ºC within a minute. Which of the following statements is TRUE about the transfer of energy between the two substances?
a. Copper lost less energy than the amount of energy gained by water
b. Copper gained the same amount of energy that was lost by water
c. Copper lost the same amount of energy that was gained by water
Answers: 2
Chemistry, 21.06.2019 22:30
Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.
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When a piece of copper metal at 100ºC was placed into a cup of water at 25ºC, the final temperature...
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